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Formula: NaFe2+(PO4)
Anhydrous normal phosphate, triphylite group,
paramorph of marićite
Specific gravity: 3.65 calculated
Hardness: 4½
Streak: Very pale greyish green
Colour: Pale green
Environments
Localities
At the type locality, the Malpensata pegmatitic dyke, Piona Peninsula, Colico, Lecco Province, Lombardy, Italy,
karenwebberite is found in the pegmatite dyke as
late-magmatic-stage exsolution lamellae up to 100 μm thick, hosted by
graftonite and associated with sodium-bearing
ferrisicklerite and with a
heterosite-like phase
(AM 98.767-772.
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